Home / 13,186.76-19,780.36-5,289.98

Finding the Fourth Proportional to 13,186.76, 19,780.36 and 5,289.98

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Solution

The fourth proportional to 13,186.76, 19,780.36 and 5,289.98 is: 7,935.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,186.76 : 19,780.36 = 5,289.98 : x
  2. Step 2: Convert to fraction form
    13,186.76/19,780.36 = 5,289.98/x
  3. Step 3: Cross multiply
    13,186.76x = 19,780.36 × 5,289.98
  4. Step 4: Simplify right side
    13,186.76x = 104,637,708.79
  5. Step 5: Solve for x
    x = 104,637,708.79/13,186.76
  6. Step 6: Final answer
    x = 7,935.06

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.